Preheat oven to 350. Place tortillas on a baking sheet and set aside.
Pat the steak dry with a paper towel and then pat the seasonings onto the steak and let it rest.
Heat oil in a skillet, then add the onion and bell pepper slices and saute for 5-7 minutes, or until some edges of the peppers/onions become browned.
Cut up the steak into strips about an inch wide and add into the skillet with the peppers and onion. squeeze half the lime over the steak peppers and onions. Cook for 4-5 minutes, until no more pink on the steak is visible. Turn heat off.
Bake tortillas in oven until edges start to curl up, carefully remove from oven and place on a plate.
To assemble tacos spread a little sour cream on one side of the tortilla, then add a few pieces of avocado and one fifth of the meat peppers and onion mixture, sprinkle with fresh cilantro and squeeze a little lime over the filling, fold taco in half and enjoy! I like to serve two tacos for me, three for my husband.